NONLINEAR EARTHQUAKE-RESPONSE ANALYSIS AND SEISMIC CONTROL OF WUHAN JUNSHAN YANGTZE RIVER BRIDGE
Earthquake is a kind of natural disaster which is difficult to predict and the damage degree is very great. Wuhan Junshan Yangtze River Bridge is an important traffic hinge on Jing-Zhu freeway. In this paper, the FEM model of Wuhan Junshan Yangtze River Bridge was established; the dynamic characteristic and nonlinear seismic responses and seismic control under uniform excitations of Wuhan Junshan Yangtze River Bridge were systematic studied. The results show that: 1) the basic cycle of Wuhan Junshan Yangtze River Bridge is about 8.881s, which is very long. Its first mode of vibration is longitudinal floating mode, which is favorable to the earthquakeresponse of structures. 2)the effect of seismic control is very evident when replacing the normal bearing by die leader rubber bearing or the viscoelastic damper or LRB+VED.3)the effect of seismic control of LRB2000 is better than that of GZY700B when comparing the two LRB.4) the effect of seismic control of viscoelastic damper is better than that of leader rubber bearing.5)for the Junshan Yangtze River Bridge, the effect of seismic control of LRB+VED is better than that of only using the leader rubber bearing or the viscoelastic damper.6) the effect of seismic control of LRB2000+VED is better than that of GZY700B+VED. It shows that in the measurements of treating with the seismic control of cable-stayed bridge, it is prior to using the high damper LRB+VED.
cable-stayed bridge earthquake-response time-history analysis Wuhan Junshan Yangtze River Bridge uniform ezcitation seismic control
Kai-Yan Xu De-Min Wei
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, P.R. China
国际会议
广州
英文
963-967
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）